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The physical plant at the main campus of a large state university recieves daily requests to replace florecent lightbulbs. The distribution of the number of daily requests is bell-shaped and has a mean of 44 and a standard deviation of 4 . Using the empirical rule (as presented in the book), what is the approximate percentage of lightbulb replacement requests numbering between 44 and 56 ? (Round percent number to 2 decimal places.) Do not enter the percent symbol. ans =